Periodic Table By furolo Feb 11, 1754 Joseph Black isolated carbon dioxide Feb 11, 1766 Henry Cavendish discovers hydrogen Feb 17, 1774 Carl Wilhelm Scheele and Joseph Priestly both isolated oxygen Feb 17, 1778 Antoine Lavoisier creates first list of elements (33) Feb 17, 1828 Jakob Berzelius develops atomic weights and chemical symbols Feb 17, 1864 John Newlands arranges known elements Feb 17, 1864 Dmitri Mendeleev produces periodic table arranged by atomic weight (66) Feb 17, 1864 Lothar Meyer creates periodic table with 28 elements ordered by valence Feb 17, 1894 William Ramsay discovered the Noble Gases Feb 17, 1898 Marie and Pierre Curie isolate radium and polonium Feb 17, 1900 Ernest Rutherford discovers the source of radioactivity as decaying atoms Feb 17, 1913 Henry Moseley found the atomic number of each of the elements Feb 17, 1940 Glenn Seaborg synthesised transuranic elements